The Archdiocese of Mercedes-Luján is a seat of the Catholic Church in Argentina immediately subject to the Holy See. In 2013 it had 735,000 baptized on 765,000 inhabitants. It is right by Archbishop Agustín Roberto Radrizzani, Archdiocese includes fifteen districts in the province of Buenos Aires, and as Archbishop's seat is the city of Mercedes, where is the cathedral of Our Lady of Grace. Luján is home to the small basilica and national sanctuary of Our Lady of Luján. The territory extends over 19,330 km² and is divided into 48 parishes, grouped into five pastoral areas: Mercedes, Luján, Lobos, Junín and Chivilcoy. The diocese of Mercedes was erected on April 20, 1934 with the bubble Nobilis Argentinae nationis of Pope Pius XI, obtaining its territory from the archdiocese of La Plata, originally Suffragan. On March 3, 1947, he sold a portion of his territory to the benefit of the erection of the diocese of San Nicolás de los Arroyos. On February 11, 1957, he handed over other portions of land to the benefit of the dioceses of Nueve de Julio and Santa Rosa. On 10 May 1989 he assumed the diocese name of Mercedes-Luján. On November 21, 1997, with the bubble Omnibus satis constat of Pope John Paul II was elevated to the rank of archdiocese immediately subject to the Holy See.